An instrument for measuring the viscosity of a fluid by passing the fluid at a known pressure gradient or velocity through a length of tubing of known diameter.
测试流体粘度的一种仪器，在实验中使流体在已知压力梯度或流速情况下流过已知直径的一段试管。
By analyzing two kinds of different design process of a example, the paper describes different instrument choice of flame detect and control, accordingly finds designing method of passing master.
通过对一个实例二种不同设计过程的分析，阐述了火焰检测监视的仪表选择，从而找到符合实际要求的设计方法。
This instrument is used to measure the speed of passing cars.
这种仪器是用来测量过往车速的。
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